Underground conduit for electric wires



(No Model.)

W. PLANKINTON.

.UNDERGROUND CONDUIT POR ELEGTRIG WIRES.

No. 273,305. Patented Mar.6,1883.

mnessea: Iwewor:

U ITED STATES PATENT. OFFICE.

WILLIAM PLANKINTON, OF 'MILY VAUKEE, WISOONSIN.

UNDERGROUND CONDUIT FOR ELECTRIC WIRES.

SPECIFICATION forming part of Letters Patent No. 273305, dated March 6, 1883.

Application filed November 25. 1882.

To all whom it may concem:

Be it known that I, WILLIAn PLANKINTON, otMilwaukee, in the county ot'Milwaukee, and in the State of Wisconsin, have invented certain new and useful Inprovements in Underground Conduits for Electric m ires; and I do lereby declare that the following is a full, clear, and exact description thereof.

My invention relates to the laying ofelcctric wires, and will be fully described heieinafter.

In the drawings, Figure 1 is a Vertical longitudinal section ot' a broken section of my device. Fig. 2 is an elevation, partly in section, ot' the same; and Fig. 3 is an interier end view of one of the bridges.

A represents piping', of clay, cement, or any other suitable substance, and B B' a bridge, which is preferably of the same substance. This bridge is preferably cylindrical, and is of two sections, ott'set, as at a, to fit upon each other, and through section B, I pass the ends of conducting-pipes O. projecting theni beyond its oti'sets a distance equal to the tlickness ot' the adjaccnt portions ot' the section B', so that when the two sections are clainped together thcends of the pipes G will just reach through section B' to receive sleeves c, by which they arejoined to pipcs O'. About the pipe-openings on the outside ot'section B', I form anuular projections b, to receive the ends of the sleeves adjacent to the section B' and to center them. l provide hand-openings c' near the end of each of the pipes C, through which to attach the tapping-wires d to the liue-Wires d', and these tapping-wires are passed down through vertical openigs in the section B', and are soldered to the line-wires, While the two sections ot' the bridge are separated for that purpose, as shown in Fig. 2, and then when the sections of the bridge are closed the wires may be tightened, as shown in Fig. 1, and connected to the building or tower wires; and should it ever be necessary to get at the openings c', the wires d d may be detached from the house or tower wires, so as to slacken them,

(Ne model.)

the pipes G' far enough to expose the liuer Wires between the ends of pipes C C'. The section B is slipped into the piping A after the pipe-sections U have b'een placed in it, and the section B' is slipped in through the other end, care being taken to place the bridge so that it will be accessible from the opening D'.

l propose making the bridge B B', as Well as the piping, both large and small, of vitritied clay; but they may be made of cement or any other non-conductor of electricity; and I think it may be well to make the bridges ot' wood under some circumstances, and I propose to employ With my device any of the Wellknown devices 'for defeating induction.

W'hati claim as my inventiou, and desire to secure by Letters Patent, is-

1. The bridge cousisting ot' sections B B', adupted to separate, and provided with oti'sets to tacilitate return to place, in conbinatiou With the large pipe containing it, and the wirepiping supported by said bridge,suhstantinlly as set forth.

2. The combination 'of the sectional bridge with the piping G G', supported ther-ein, and the sleeves c, adapted to unite the ends ot' said piping, substantially as set t'ortl.

3. The line-wire piping having openings to receive the tapping-wire, in combination With the sectional bridge perforated to receive the said tapping-wire, substantially as set l'ortl.

In testinony that I claimpthe 'oregoing have hereunto set my hand, on this 27th day of October, 1882, in the presence of two witnesses.

NVILLIAM PLANKINTON.

Witnesses:

S. S. STOUT, H. G. UNDERWOOD. 

